Bed



Feb. 14, 1939. Rfp MCGREW BED Filed March 9, 1937 5 Sheets-Sheet lATTORNEY Feb. 14, 193Y9. R McRL-:w

BED

Filed March 9, 1937 5 Sheets-Sheet 2 ATTORNEY R. P. MCGREW Feb. 14,1939.

BED

5 Sheets-Sheet 3 ATTORNEY Feb. 14, 1939. R, P, MCGREW v2,146,970

BED

' Filed March 9, 1937 5 Sheets-Sheet 4 .57 62 60 d4 INVENTo 6a 63 65 6975 y 59 BoezP/@QW ATTORNEY Patented Feb. 14, 1939 @UNIT-ED STATES oFieles Claims.

This invention relates to -bedsandfmoe'partieularly` to aneadjustablehospital bed.

, r The general object of the invention is toprovidea-bed whihmaybe soadjustedthat'the 5 back and head of'an occupant of the bed naybeinclined Aupwardly -from the normarhoria'oital position, Vandqtheflegsof the oocupantmay be lowered-from the horizontalposition 6r raisedu at`-an-angle from the-horizontal po st ion V andfwhen so-raised, the legsArr1 a y,from the-kneesdown, be 1owered into a horizontal position.

Anothenobject is to-provide a bed 'of theV character stated which may beop erated slowly4 and vsmoothlyfso as jtoavoid any diseomifortto theocoupantof the bed, while the bed isbeing adjusted.; .L Y

,Aefurbhereobiectie merg/1de@ bed-Which may be adjusted to raise thebagl and head', andl lower thelegs ofj anoccupantpf the bed, l'and whichis constructed so that-tire foot memloenof the bed may be swung ontgroin one side ofthefnbed to open the foot end` of the bed, vwhen ,thebed Vis adjusted, as described, order that the oooupant maystepout ofthe bed through said 'open fQot end therffofe e e Other objects andadvantages of thevinvention willappear'v as A thespecification proceeds.

W' h Ythe aboveandfother objects-fin yiewfthe invention consists in thenovel and useful.V provision, formation, construction', association',dand relative arrangement of -partsQ members and features,a 1ljas shownin a certain empodiriritfin the accompanying drawings, desveriloezlwvgenerally, aridv moreparticularly pointed out' the claims.

Figure '1"S afp@ t v spring shown adjusted for raising the' headA andback of anoccnpantof'the bed at `an`angle`and fthe bed springin fulllines; adjust'd as `in`Figure 1, Iand showing the adjustable sectinsofthe spring 'in-their normalhorizontalpsitions in e`r p Q t5 dvxftedHees,

showing the leg-supporting section 4ofthe'loed spring elevated above,Aits nl )rrnal"fhoriztali -potal, and the lower -legfsupp'rtng'nener"ofsaid section eiterdinglhori'zontally Tronisad' upperbedateneonline-@Lafer Fisez,

metres 11e e'-eresseeeneeer-view'erene'erthe 4 2,."W for lowering thelegs of the occupant 'at 'an angle, A

Figure 3-is a fragmentary longitudinal nvertical Thesidenlembers 4 theremj-f'ofeheener here with `s"`fagng'inward1y. "A transar Scoricts' the'sidev members 4 Haeconneted tothe head tra verse* channel bar 'I i4 near`their ends b awspnngs i'isror'mea wahrer-interpporting's'ect'on 28,`Tor-supporting the f the occupant of the -andiback' supporting 45 foffofsupporting theklegs legfsup a portion of the coil springs I2 andconnections of the bed spring pro-per, which coil ysprings are connectedto the side arms I5 and connecting member I6, of said frame, throughholes I1 and i8 in flanges I9 and 29 extending inwardly from the upperedges of-said side arms and connecting member, respectively. Thehead-and-back supporting section 9 is hinged to one end of theintermediate supporting section 8 of the bed spring 5 by hinges 2Iconnecting the adjoining ends oi the anges II and I9 of said supportingsections.

The leg-supporting section I of the bed spring 5 comprises an upperleg-supporting member 22 and a lower leg-supporting member 23. The upperleg-supporting member 22 comprises a pair `'of links 24, formed withinturned flanges 25 along their upper edges, and a portion 'of the coilsprings I2 and connectionsk of the bed spring proper, which coil springsare connected to' said links 24 through holes 26 in said link flanges25. The lower leg-supporting member 23 comprises a U- shaped frame 21and a portion of the coil springs `I2 and connections of thev bed springproper,

.mediate supporting section, and the anges 25 of the links 24 ofsaid'upper leg-supporting member 22. The lower leg-supporting'member 23of` the leg-supporting Asection I8 is'hinged to the upper leg-supportingmember 22 by hinges 35 connecting the adjoining ends of the flanges 25of the links 24 of said upper leg-supporting member, and the anges 32 ofthe side armsY 28 of said lower leg-supporting member 23.Thelowerleg-supporting member 23 of the bed spring is held parallel orat an angleto the upper legsupporting member 22 by means of a pair ofdogs 36, pivoted at one'end at 31'to the side arms l28, respectively, ofthe frame 21 and screw pins 38 extending inwardly from the 'links 24,respectively, of the upper leg-supporting member 22,

which dogs are each provided at their' other ends with a pair of notches39 and 4 9 in their lower edges for respectively engaging said pins 38on said links 24. Springs 4I are `coiled around the dog pivots 31,respectivelywith one end of said springs secured to the anges 32 of theside arms 23` of frame 21, respectively, and the other ends of saidsprings engaging the upper edges of said dogs, respectively, wherebysaid dogs are swung down so that the pins 38 on the links 24 will engageeither the notch 39 or the notch 40 in said dogs, respectively, forholding the lower legsupporting member 23 in straight alignment with theupper leg-supporting member 22, as shown'in Figure 2 of the drawings, orfor holding saidY lower leg-supporting member at an angle to said upperleg-supporting member and in a horizontal position, as shown in Figure 3of the drawings. Lever larms V42 are pivoted, respectively, to the lside arms 28 of the frame 21, and links 43 conneetl said lever arms tothe dogs 36, respectively,

whereby upon swinging said lever arms in one direction, said dogs areswung upwardly on their pivots to disengage 'either the notches 39 or 48of said dogs from the pins 38,so that the lower leg member 23 may beswung on its hingesr 35 with relation to the upper leg-supporting member22. A foot rest 44 is hinged by hinges 45 to the under side of theflange 33 of the connecting member 29 of frame 21, there being lugs 46formed on the lower edge of said foot rest connecting the foot rest tosaid hinges, which lugs extend through slots 41 in said flange 33 andthe l frame connecting member 29, and. engage the lower ends of saidslots to hold said foot rest in its raised and operative position,extending upwardly at right angles from the frame connecting member 29for supporting the feet of the patient in the bed and also for engagingthe foot end of the mattress, which is placed upon the bed spring 5 toprevent the mattress from sliding oi the foot end of the bed spring whenthe legsupporting section I of the bed spring is lowered and thehead-and-back section 9 4 of the bed spring is raised as shown in Figure2 of the drawings.

The pins 38 on the links 24 of the upper legsupporting member 22, areconnected to the upper ends of a pair of links 41, the lower ends ofwhich links are connected to a pair of crank arms 48, which are securedon a crank shaft 49 extending transversely of the bed I and journaled atits ends in the side members 4, respectively, of the bed. Said rockshaft 49 carries a worm wheel 50within one of the side members 4 of thebed, which worm wheel is in mesh with a worm I secured on one end of atransmission shaft 52, journaled in bearings 53 and 54 mounted upon andwithin said side member 4. On the other end of said transmission shaft52 is secured a bevel pinion 55 in mesh with a bevel pinion 56 on oneend of a second transmission shaft 51 journaled in a bearing 58 mountedon the inside of the transverse channel bar 1. A drive shaft 59 isjournaled in a bearing 60 on the inner side of the transverse bar 1 andone end of said drive shaft may be clutched to the other end of thetransmission shaft 51 by a clutch 6I comprising a pair of clutch members62 and 63. The clutch member 62 is secured on said end of said driveshaft 59, while the clutch member 63 is slidably keyed on the adjoiningend of the transmission shaft 51 by means of a key 64 secured at itsends in said clutch member and extending through a longitudinal slot 65in said transmission shaft. In the outer end of the clutch member 62 isformed -a bearing 66 in which is journaled the adjoining end of thetransmission shaft 51. 'Ihe clutch member 63 is provided with an annulargroove 61 engaged by a Vfork 68 upstanding from one end of aclutch-operating bar 69 slidably mounted on the lower flange 1U of thetransverse bar 1, whereby said clutch member 63 is shifted into or outof engagement with the clutch member 62 for clutching the transmissionshaft 51 to, or unclutching said transmission shaft from, the driveshaft 59. In said flange 18 is provided a longitudinal slot 1I throughwhich extends a stud 12, the upper end 13 of which is screw-seated inthe clutch-operating bar 69, while its lower end is formed with aknurled hand grip 14 to be grasped by ones hand for shifting saidclutch-operating bar 69. On the drive shaft 59 is secured a worm wheelin mesh with a worm 16 secured on a crank shaft 11 extending through thetransverse l bar 1 and journaled in said bar and, at its inner end, in abracket 18 secured to the upper ange 19 of said transverse bar by ascrew 80. A third transmission shaft 8I is journaled in a bearing 82mounted on the inside of the transverse bar 1, which shaft may beclutched at its inner end of the. clutch member 8.4 isv 1in which. isjournaled kthefaolJ -transmission. .shait;.81. In the enter fend pornonofthe clutch. mentent-5.15. prorideiienniinular groove A88. engaged. bila OTJS, ,gpsinding from the.oth.er,. end of thegplutchoperating bar 6.9.'On .theV ouienend.. .of the' transmission shaft 8l is securedabeveipiileli!! 1.1.1-, HeShWh .a bevel pinion. 9 l. secured. on ,opened.9i fourth transmission 'shaft ..92 .JQlJUMi-d irl-Sloggi ..93 mountedon the inside of the other side member 4 0f .the bed. l... On theotherLenilsfsaid'irarsmission. shaft 92 issenreda norm. .94,111 mesh.with a Worm wheel, szseciiredn .a Crankshaft seextendingtransversely@.ihehbed .l .and 10.1.11- naled ,atitsjendsjintne Vsidemembers 4, respectively, of the leed.. ..011 saidsrank .shaii 9511sSecured a pair @f erank arms91,..whi9h are conheated at theirouterensisio the. lower ends Oia pairv of links 98, ,res pectivel y,theupper ends of which links are connected to theside arms |5 respectivelyof theframegMwof thehead-andback supportingV section!!A o f the bedspring A crank |l is detachably flttedontheputer 'end ofthe `crank.shaft 11, and4 extends Voutside of the foot member3 of thebedlforrotatingsaid crank shaft and the worm 1li` fion operating themechanism for adjusting the. head-and-back supporting section 9 andv'the -leg-,supportingsection It] of the bed spring'5.

The operation, uses,iandadvantages`of the invention are as follows:

My bed may be used as.. a conventional bed when the head-and-back isupporting section 9 and the leg-supporting section .lll` ofthe bedspri'ng'5 are in` their horizontal positions in alignment withthe'horizontal intermediate supporting section 8, las illustratedindotted lines in Figure`2 of the drawings.V

When it is desired Ato raise thephead and back of the occupant of mybedfan attendant grasps the hand grip 14 and shifts thevclutch-operating slide bar 59 to the left (Figure 5), whichthrough itsforks4 68 and J89, shifts'v the :clutch member 63 out of engagement withthe fclutch'member 62 andunclutches the Vtransmissionrshait 51 from thedrive shaft 59,- and shifts' the clutchimember "as inte, engagement withthe clutch member "sa andclutches thet'ransmission 'shaft 8| to saidVdrive shaft 59. "I hecrank |09 vis then .grasped and rotgitedfleytheattendant, which rotates the 'worm 16. The rotation of Asaid wormrotates the worm wheel 15 andthe' drive shaftV 5 9, and said drive shaftin turn rotates the transmission'shaft sl, eiuteheditherefe by eiuteh'sa, andthe bevel pinion 0. Thefrotationff said bevel pinion rotatesthehieveifpiniehfsl, trahehiissieh shaft 92 Vporting section maybe heldbythe engagement `of the worm wheel 95 withfthe worm 94.

When itis desired to lower'theleg-supporting rsection`|ll ofthe'bedspringthe clutch member 85 is shifted outof engagement with theclutch member 84, unolutching the transmission shaft 8| from the driveshaft 59, and. the clutch member 63is shifted into -engagement with theclutch member 62 byme'ans of thefclutch-operating bar 69, clutching. the,.transn 1is` s`ion vshaft 51 to the drive shaft 59.. The crank |09.is'then rotated, which rotates theworm 16 andfsaidworm rotates the wormwheel-.'15,drive'shaft'59 andthe transmission shaft 51, ,clutched to thedrive shaft, and the bevel pinion56. Said 'bevel'pinion in turn rotatesbevel .pinion 55, transmission shaft 52 and worm '5|, which worm rotatesthe worm wheel 50,"crankshaft 49 and Acrar1k 's`48,' land said cranks,through the medium of thelinks 41,

swing the leg-supportings'ection l0 of the 'bed spring down on itshinges'34, 'at'an 'angle tothe horizontal intermediate 'supportingsection f8, as shown in full` lines in'FigurefZ of the drawings.

When it isdesiredto raise' the leg-supporting section lil of the bedspring'5, the transmission shaft 8| being unclutched from thedrive'shaft 59, and the transmission'shaft 51`beirig clutched to thedrive shaft by c1utch 6|, as above described, the crank |00 is rotatedin the opposite,

direction, whereupon the leg-'supporting,Y section 9, through the mediumof `the crank Shaft'11, worm 16, worm wheel 15, drive shaft59, clutch Y6transmission shaft^5 1-, bevelV pinions 55 andE,

is `swung upwardly onfits hinges Y34 at an angle AshowninFigureiuponswingingthe lever arms 42 and, through links 4 3, swingingthe dogs '36 upwardlyV to disengage fthe do g notches 39 V'from the pins38, and when said lower leg-supporting member isswung into such angularposition with relation toltheuppe.' lgtsupirting member, it

may be so heldbyallqwing dogs35 to swing io-wus@ that thepinsieiigase-ihe @seventies 40. The'leg-supporting section vlil is heldin any position jto whichr it is swung by the. engagement of the wormwheel `50 with the worm 5|.

When the head-and-bak supporting section 9 is swung up and theleg-supporting-'seetion l0 is swung down, as shownin Figure 2, my bed isconverted into the form *of an invalids chair, thus enabling theoccupant-ofthe bed to sit'up vWithout getting out of the bed'andsittingvin a chair.

The operating mechanism o-f my bed, including the worms and wormwhee`1s, causes the head-and-backsupporting section and the, leggal:supportingl section to bes up or 'down smoothly and slowly, soasJtolav'oid `any' discomfortto the occupant of thelbed. y

In the modification of my bed shown :in Figures l 9 to 1 2, inclusive ofthe dra'wiiigs, the tran'sverse ,channelbar 1 is eliminated andthe parts'51 to 89, inclusive, of the operating mechanism'are mounted on theinside of one of the side members yL as shown in Figures 9 and 10, whilethe foot member ||l| of the bed is hinged at one of its side edges by ahinge |02 to the foot end Vures 9 and '10.

of said side member 4, and securing means |03 is provided for securingsaid foot member at its opposite side edge to a leg |04, which issecured at its upper portion to the foot end of the other side member 4of the bed for supporting said end of said other side member, as shownin Figures 9 and 11.

Worms |05 and |00 are secured on the ends of the shafts 51 and 8|,respectively, of said parts of the operating mechanism mounted on saidside member 4, which worms mesh with the worm pinions 95 and 50,respectively, as shown in Fig- The crank shaft 11 extends through anopening .|01 in the side of said side member 4 to receive the crank |00.

'I'he securingmeans |03 comprises a thumb screw |08 formed with acylindrical portion |09, a screw shank ||0 extending from one end ofsaid cylindrical portion, and a thumb piece formed on the other end ofsaid cylindrical portion |09. The cylindrical portion |09 of said thumbscrew is turnably iitted in an opening ||2 edge, for securing said edgeof said foot member `to the leg |04 and holding said foot member inposition extending across the foot end of the bed. Dowel pins I| 4 and||5 project from the leg |04 below and above the opening H2, re-

spectively, in said leg for projecting into openings ||6 and ||1 in thefoot member |0| near the unhinged edge of said foot member for firmlyholding said edge of said foot member to the leg |04 when said footmember is swung across the foot end of the bed.

When the clutch 83 is brought into operation in the manner hereinbeforedescribed, rotation of the crank shaft 11 by the crank |00, rotates theWorm |06 through the medium of the worm 16, wo-rm wheel 15, transmissionshaft 50, clutch 83 and transmission shaft 8|, and said worm |06 rotatesthe worm wheel 50 and rock shaft 49 which, in turn, through links 48 and41 swings the leg-supporting section I0 up or down onits pivots 34.

When theclutch 6| is brought into operation, rotation of the crank shaft11, by the crank |00, rotates the worm |05 through the medium of theworm 16, worm Wheel 15, transmission shaft 59, clutch 6|, andtransmission shaft 51, and said worm |05 rotates the worm 95 and rockshaft 96, which in turn through links 91 and 98 swings the head-and-backsection 9 up orV down on its pivots 2|.

When the leg section |0 is swung down, the thumb screw |08 may beunscrewed from the threaded opening I3 in the foot member |0| and saidmember swung outwardly on its hinge |02 to open the foot end of the bed,as shown in Figure 11, so that the occupant of the bed may step out ofthe bed through said open foot end.

I claim:

1. A bed including a head member, a pair of side members secured at oneend to said head member, a foot member hinged to the other end of one ofsaid side'members to be swung across the foot end of the bed or swungoutwardly from the foot end of the bed to open said end of the bed,means for securing said foot member in position swung across the footend of the bed, a bed spring supported by said side members and formedwith a horizontal section, an adjustable leg section and an adjustableback section, and means for swinging said leg section downwardly andsaid back section upwardly from the horizontal position of the bedspring.

2. A bed including a head member, a pair of side members secured at oneend to said head member, a foot member for normally supporting the otherend of said side members, means whereby said foot member may bewithdrawn from the foot end of the bed to provide an unobstructedopening at the foot end of the bed, a bed spring formed with anadjustable leg section and an adjustable back section, and means forlowering said leg section and raising said back section fromA thehorizontal position of the bed spring.

3. A bed including a head member, a pair of side members secured at oneend to said head member, a foot member for supporting the other end ofsaid side members, means whereby said foot member may be normallyextended across the foot'end of the bed or moved from its normalposition to provide an unobstructed opening at the foot end of the bed,means intermediate the head member and foot member for holding the footends of said side members in properly spaced relation when said footmember is moved from across the foot end of the bed, a bed spring formedwith adjustable leg and back sections and means for lowering said legsection and raising said back section from the horizontal position u thefoot end of the bed or swung outwardly from the foot end of the bed toopen said end of the bed, a leg for supporting the other end of theother side member, against which leg ts the adjacent side of said footmember when swung across the foot end of the bed, means for releasablysecuring said adjacent side of said foot member to said leg, a bedspring fo-rmed with adjustable leg and back sections and means forlowering said leg section and raising said back section from thehorizontal position of said bed spring.

5. A bed including a head member, a pair of side members secured lat oneend to said head member, a foot member hinged tothe other end of one ofsaid side members to be swung across the foot end of the bed or swungoutwardly from the foot end of the bed to open sai-d end of the bed, aleg for supporting the other end of the other side member, against whichleg ts the adjacent side of said foot member when swung across the footend of the bed, registering means carried by said leg for cooperationwith the adjacent side of said foot member when swung across the footend of the bed, means for securing said adjacent side of said footmember to said leg, a bed spring formed with adjustable leg and backsections 'and means for lowering said leg section and raising s aid backsection from the horizontal position of said bed spring.

ROBERT P. MCGREW.

